package com.syt.mall.auth.controller;


import com.alibaba.fastjson.TypeReference;
import com.syt.common.constant.AuthServerConstant;
import com.syt.common.exception.BizCodeEnume;
import com.syt.common.utils.R;
import com.syt.common.vo.MemberResoVo;
import com.syt.mall.auth.feign.MemberFeignServer;
import com.syt.mall.auth.feign.ThirdPartFeignService;
import com.syt.mall.auth.vo.UserLoginVo;
import com.syt.mall.auth.vo.UserRegistVo;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.util.StringUtils;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Slf4j
@Controller
public class LoginController {
    @Autowired
    private StringRedisTemplate redisTemplate;

    @Autowired
    private ThirdPartFeignService thirdPartFeignService;
    @Autowired
    private MemberFeignServer memberFeignServer;
    /**
     * 发送一个请求直接跳转到一个页面
     * SpringMVC viewcontroller:将请求和页面映射过来
     */

    @ResponseBody
    @GetMapping("/sms/sendCode")
    public R sendCode(@RequestParam String phone){
        // TODO 接口防刷


        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if(System.currentTimeMillis()-l < 60*1000){
                //60秒内不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        //2.验证码的再次校验.redis 存key-phone value-code sms:code:137XXXXXXX -> code
        String code= UUID.randomUUID().toString().substring(0,4);

        //redis缓存验证码,防止同一个手机号在60秒内再次发送验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,code+"_"+System.currentTimeMillis(),10, TimeUnit.MINUTES);
        thirdPartFeignService.sendCode(phone,code);
        log.info("手机验证码:{}",code);
        return R.ok();
    }


    /**
     * // TODO  重定向携带数据,利用session原理.将数据放在session中.只要跳到下一个请求页面取出这个数据之后,session里的数据就会删除
     * // TODO 1.分布式下的session问题
     * RedirectAttributes attributes 模拟重定向携带数据
     * @param vo
     * @param result
     * @param attributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes attributes){
        if (result.hasErrors()){
            Map<String,String> errors = new HashMap<>();
            errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            attributes.addFlashAttribute("errors",errors);
            //校验出错,转发到注册页
            return "redirect:http://auth.mall.com/reg.html";
        }
        // 真正注册
        //1.校验验证码
        String code = vo.getCode();
        String codewithTime = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if (!StringUtils.isEmpty(codewithTime)){
            if(code.equals(codewithTime.split("_")[0])){
                // 删除验证码,令牌机制
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX+vo.getPhone());
                //验证码通过,真正注册,调用远程服务继续注册
                R r = memberFeignServer.regist(vo);
                if (r.getCode()==0){
                    //成功
                    return "redirect:http://auth.mall.com/login.html";
                }else {
                    Map<String,String> errors = new HashMap<>();
                    errors.put("msg",r.getData("msg",new TypeReference<String>(){}));
                    attributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.mall.com/reg.html";
                }
            }else {
                Map<String,String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                attributes.addFlashAttribute("errors",errors);
                //校验出错,转发到注册页
                return "redirect:http://auth.mall.com/reg.html";
            }
        }else{
            Map<String,String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            attributes.addFlashAttribute("errors",errors);
            //校验出错,转发到注册页
            return "redirect:http://auth.mall.com/reg.html";
        }

    }

    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes attributes, HttpSession session){
        //远程登录
        R login = memberFeignServer.login(vo);
        if(login.getCode() == 0){

            MemberResoVo data = login.getData("data", new TypeReference<MemberResoVo>(){});
            //登录成功放入session中
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://mall.com";
        }else {
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            attributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.mall.com/login.html";
        }
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session){
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute==null) {
            //没有登录
        return "login";
        }else {
            return "redirect:http://mall.com";
        }
    }
}
